Once upon a time, William Herrin <b...@herrin.us> said: > On Tue, Jan 23, 2024 at 4:00 PM Chris Adams <c...@cmadams.net> wrote: > > Once upon a time, William Herrin <b...@herrin.us> said: > > > Nevertheless, in the protocol's design, the one expressed in the > > > RFC's, AS path length = distance. > > > > The RFC doesn't make any equivalence between AS path length and > > distance. You are the one trying to make that equivalence, > > Respectfully Chris, you are mistaken. > > https://datatracker.ietf.org/doc/html/rfc4271#section-9.1.2.2 > > "a) Remove from consideration all routes that are not tied for having > the smallest number of AS numbers present in their AS_PATH > attributes." > > So literally, the first thing BGP does when picking the best next hop > is to discard all but the routes with the shortest AS path.
That's literally not the first thing - you skipped section 9.1.1. It also literally says nothing about distance. -- Chris Adams <c...@cmadams.net>
